CN102131450A - Insertion section of endoscope - Google Patents

Insertion section of endoscope Download PDF

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Publication number
CN102131450A
CN102131450A CN200980133010XA CN200980133010A CN102131450A CN 102131450 A CN102131450 A CN 102131450A CN 200980133010X A CN200980133010X A CN 200980133010XA CN 200980133010 A CN200980133010 A CN 200980133010A CN 102131450 A CN102131450 A CN 102131450A
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China
Prior art keywords
unit
heater
insertion section
insertion part
image
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Granted
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CN200980133010XA
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Chinese (zh)
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CN102131450B (en
Inventor
青野进
小久保光贵
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Olympus Corp
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Olympus Medical Systems Corp
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    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B23/00Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
    • G02B23/24Instruments or systems for viewing the inside of hollow bodies, e.g. fibrescopes
    • G02B23/2476Non-optical details, e.g. housings, mountings, supports
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/00064Constructional details of the endoscope body
    • A61B1/00071Insertion part of the endoscope body
    • A61B1/0008Insertion part of the endoscope body characterised by distal tip features
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/00064Constructional details of the endoscope body
    • A61B1/00071Insertion part of the endoscope body
    • A61B1/0008Insertion part of the endoscope body characterised by distal tip features
    • A61B1/00096Optical elements
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/002Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor having rod-lens arrangements
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/005Flexible endoscopes
    • A61B1/0058Flexible endoscopes using shape-memory elements
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/04Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor combined with photographic or television appliances
    • A61B1/05Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor combined with photographic or television appliances characterised by the image sensor, e.g. camera, being in the distal end portion
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/12Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor with cooling or rinsing arrangements
    • A61B1/127Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor with cooling or rinsing arrangements with means for preventing fogging
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/12Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor with cooling or rinsing arrangements
    • A61B1/128Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor with cooling or rinsing arrangements provided with means for regulating temperature
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B23/00Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
    • G02B23/24Instruments or systems for viewing the inside of hollow bodies, e.g. fibrescopes
    • G02B23/2407Optical details
    • G02B23/2453Optical details of the proximal end

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Surgery (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Biomedical Technology (AREA)
  • Animal Behavior & Ethology (AREA)
  • Radiology & Medical Imaging (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Engineering & Computer Science (AREA)
  • Biophysics (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Pathology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Astronomy & Astrophysics (AREA)
  • General Physics & Mathematics (AREA)
  • Endoscopes (AREA)
  • Instruments For Viewing The Inside Of Hollow Bodies (AREA)

Abstract

An insertion section of an endoscope, configured in such a manner that an actuator unit and a heater unit are used in combination with an imaging unit, wherein the actuator unit uses a shape memory member, which is deformable according to temperature, in order to drive a movable optical member of the imaging unit and wherein the heater unit uses a heating member in order to heat a tip optical member of the imaging unit. The configuration allows the actuator unit of the insertion section of an endoscope to be appropriately operated. An axially extending insertion section of an endoscope is provided with: an imaging unit (38) for capturing an observation image, the imaging unit (38) having an optical axis (O) and being provided with a tip optical member (44) mounted to the tip of the imaging unit (38) and also with a movable optical member (51) movable relative to the tip optical member (44); an actuator unit (56) for driving the movable optical member (51), the actuator unit (56) having a shape memory member (58) deformable according to temperature; and a heater unit (62) having a heating member (63) for heating the tip optical member (44), the heater unit (62) being, when viewed in the axial direction of the insertion section (21), located opposite the actuator unit (56) across the optical axis (O) of the imaging unit (38).

Description

Endoscope insertion part
Technical field
The present invention relates to image unit is used simultaneously the endoscope insertion part of actuating unit and unit heater, in actuating unit, in order to drive the movable optics of image unit, use can be along with the shape memory parts of temperature deformation, in unit heater, for the front end optics to image unit heats, use heater block.
Background technology
In TOHKEMY 2007-219155 communique, an example of actuating unit is disclosed.In the endoscope of TOHKEMY 2007-219155 communique, dispose image unit at forward end section of endoscope.Image unit has the mobile lens frame, and this mobile lens frame is equipped with objective lens and can moves on optical axis direction.The mobile lens frame is driven by actuating unit, in actuating unit, has used marmem (shape memory alloy is hereinafter referred to as SMA) line.
In Japanese kokai publication hei 11-47080 communique, an example of unit heater is disclosed.In the mirror body (scope) of Japanese kokai publication hei 11-47080 communique, heater is arranged on the leading section of mirror body in the mode that coats the objective lens optical system periphery.The heat that is produced by heater is transmitted to objective lens optical system, thereby the temperature of objective lens optical system rises, and it is fuzzy to prevent that thus objective lens optical system from producing.
Use at the same time under the situation of actuating unit and unit heater, the shape memory parts of actuating unit might be affected because of the heat that heater block produced of unit heater, thereby actuating unit can not move rightly.
Summary of the invention
The present invention finishes in view of above-mentioned problem, and its purpose is, the endoscope insertion part that actuating unit is moved rightly is provided.
In a form of implementation of the present invention, endoscope insertion part extends in the axial direction, it is characterized in that, this endoscope insertion part has: image unit, it is taken and observes image, this image unit has the front end optics of the leading section that is disposed at described image unit and the movable optics that can move with respect to described front end optics, and this image unit has optical axis; Actuating unit, it drives described movable optics, and having can be along with the shape memory parts of temperature deformation; And unit heater, it has the heater block that described front end optics is heated, described insertion section axially on observe, with respect to the optical axis of described image unit, this unit heater is configured in a side opposite with a side that disposes described actuating unit.
In this form of implementation, the insertion section axially on observe, in the scope that actuating unit and unit heater are configured on function to be allowed each other from farthest, therefore, the shape memory parts are not vulnerable to the influence by the heat of heater block generation, have guaranteed the appropriate action of actuating unit.
In a preferred implementing form of the present invention, endoscope insertion part is characterised in that, described image unit has the support unit at the upwardly extending tubular of axle of described insertion section, described movable optics and described front end optics are configured in the inner chamber of described support unit, described actuating unit is configured in the outer circumferential surface section of described support unit, described unit heater is configured in the inner peripheral surface portion of described support unit, and described support unit has adiabatic function.
In this form of implementation, owing between actuating unit and unit heater, dispose the support unit that possesses adiabatic function, so the shape memory parts more are not vulnerable to the influence by the heat of heater block generation.
In a preferred implementing form of the present invention, endoscope insertion part is characterised in that, described image unit has two shooting substrates, described insertion section axially on observe, the straight line that links described actuating unit and described unit heater is the approximate vertical bisecting line of the line segment of described two the shooting substrates of binding.
In this form of implementation, described insertion section axially on observe, in the scope that actuating unit and two shooting substrates and unit heater and two shooting substrates are configured on function to be allowed each other from farthest, therefore, the shape memory parts are not vulnerable to the influence by the heat of two shooting substrates generations, two shooting substrates are not vulnerable to the influence of the heat that produced by shape memory parts and heater block, have guaranteed the appropriate action of actuating unit and image unit.
In a preferred implementing form of the present invention, endoscope insertion part is characterised in that, described endoscope insertion part also has two lighting units that are used for providing to the object of observation illumination light, described insertion section axially on observe, the straight line that links described two shooting substrates is the approximate vertical bisecting line that links the line segment of described two lighting units.
In this form of implementation, described insertion section axially on observe, in the scope that actuating unit and two lighting units and two shooting substrates and two lighting units are configured on function to be allowed each other from farthest, therefore, shape memory parts and two shooting substrates are not vulnerable to the influence of the heat that produced by two lighting units, have guaranteed the appropriate action of actuating unit and image unit.
In a preferred implementing form of the present invention, endoscope insertion part is characterised in that, described shape memory parts and described heater block described insertion section axially on dispose mutually with staggering.
In this form of implementation, because shape memory parts and heater block dispose in the axial direction mutually with staggering, so the shape memory parts are not vulnerable to the influence by the heat of heater block generation, have guaranteed the appropriate action of actuating unit reliably.
In a preferred implementing form of the present invention, endoscope insertion part is characterised in that, described image unit has imaging apparatus and shooting substrate, described shape memory parts, described heater block, described imaging apparatus and described shooting substrate described insertion section axially on dispose mutually with staggering.
In this form of implementation, because described shape memory parts, described heater block, imaging apparatus and shooting substrate be configuration mutually in the axial direction with staggering, therefore the shape memory parts are not vulnerable to the influence by the heat of imaging apparatus and the generation of shooting substrate, imaging apparatus and shooting substrate are not vulnerable to the influence by the heat of shape memory parts and heater block generation, have guaranteed the appropriate action of actuating unit and image unit more reliably.
In a preferred implementing form of the present invention, endoscope insertion part is characterised in that described endoscope insertion part also has the lighting unit that is used for providing to the object of observation illumination light, and described lighting unit has: the light guide member of guiding illumination light; And irradiation part, this irradiation part is connected with the end of described light guide member, and to object of observation irradiation illumination light by described light guide member guiding, the connecting portion between described shape memory parts, described imaging apparatus and described shooting substrate and described light guide member and the described irradiation part described insertion section axially on dispose mutually with staggering.
In this form of implementation, because the connecting portion between shape memory parts, imaging apparatus and shooting substrate and light guide member and the irradiation part is configuration mutually in the axial direction with staggering, therefore, shape memory parts and imaging apparatus and shooting substrate are not vulnerable to the influence by the heat of lighting unit generation, have guaranteed the appropriate action of actuating unit and image unit more reliably.
Description of drawings
Fig. 1 is the side view that the endoscope of one embodiment of the present invention is shown.
Fig. 2 is the longitudinal section of leading section that the insertion section of one embodiment of the present invention is shown.
Fig. 3 is the sectional elevation of the leading section of the insertion section that one embodiment of the present invention is shown of the III-III line along Fig. 2.
Fig. 4 is the front view of leading section that the insertion section of one embodiment of the present invention is shown.
Fig. 5 is the sketch map that the leading section of the insertion section of observing one embodiment of the present invention in the axial direction is shown.
Fig. 6 is the schematic longitudinal section that is illustrated in the leading section of the insertion section of observing one embodiment of the present invention on the left and right directions.
Fig. 7 is the schematic longitudinal section that is illustrated in the leading section of the insertion section of observing one embodiment of the present invention on the above-below direction.
Fig. 8 is the schematic longitudinal section that the bending section of observing one embodiment of the present invention in the axial direction is shown.
The specific embodiment
With reference to accompanying drawing an embodiment of the invention are described.
With reference to Fig. 1, endoscope 20 has the intravital insertion section 21 of insertion.In insertion section 21, from front to base end side, dispose rigid front end rigid 22, carry out flexure operation bending section 23, be strip and have flexible flexible pipe portion 24.The base end part of insertion section 21 is connected with the operating portion 25 that is kept, operated by the operator.The bending operation bar 27 that on operating portion 25, disposes various switches 26 and be used for bending section 23 is carried out bending operation.Extend general cable 28 from operating portion 25, dispose light source adapter 29 in the extension end of general cable (cable) 28.In addition, extend cable 31, dispose electric connector 32 in the extension end of cable 31 from light source adapter 29.Light source adapter 29, electric connector 32 are connected with light supply apparatus and video processor respectively.
Below, the various unit of detailed description insertion section 21.
In addition, extend in the axial direction insertion section 21, and the axially vertical and both direction of establishing with insertion section 21 that be perpendicular to one another is above-below direction and left and right directions.In Fig. 2 to Fig. 8, represent upper and lower, left and right with U, D, L, R respectively.
With reference to Fig. 2 to Fig. 4, dress unit 33 outside disposing on rigid 22 of front end, this outer dress unit 33 constitute the housing of rigid 22 of front end.Outer dress unit 33 is formed by front exterior member 34 and base end side exterior member 35, the outer coaxially embedding of the leading section of base end side exterior member 35 cylindraceous and be fixed in the short cylindrical shape front exterior member 34 base end side partly on.Shooting hole 36 and illumination holes 37 are formed in the front exterior member 34 in the mode that connects in the axial direction.
With reference to Fig. 2 to Fig. 7, adorn outside to dispose in the unit 33 and take the image unit 38 of observing image.Image unit 38 insertion section 21 axially on extend.The central shaft of image unit 38 is consistent with the optical axis O of image unit 38, and be configured to respect to insertion section 21 central shaft, on the above-below direction a little on the lower side, on left and right directions, be positioned at right-hand.Image unit 38 is formed by the objective optical unit 39 of front and the shooting optical unit 41 of base end side.
With reference to Fig. 2 to Fig. 4, objective optical unit 39 has the outside cylindraceous lens frame 42 as support unit.Outside lens frame 42 is by the low material of pyroconductivity, and for example Polyphenylene Sulfone (Port リ Off エ ニ Le サ Le Off オ Application), polyether-ether-ketone (ピ one Network), polysulfones (Port リ ス Le Off オ Application), polyethylene, rustless steel form, and have adiabatic function.Outside lens frame 42 is embedded within the shooting hole 36 of front exterior member 34, and is fixed in front exterior member 34 by hold-down screw 43.Embedded and be fixed in the leading section of outside lens frame 42 as the object lens of front end optics protection lens (cover lens) 44.The front end face of object lens protection lens 44 and the front end face of front exterior member 34 are roughly with one side, are exposed to the outside.Usually, because body temperature than room temperature height, therefore, is inserting insertion section 21 under the intravital situation, the front end face of object lens protection lens 44 might produce fuzzy.Inboard lens frame 45 is embedded and be fixed in the base end side part of outside lens frame 42.Mobile lens frame 46 is to insert in the front part of inboard lens frame 45 in the mode that can move in the axial direction with respect to inboard lens frame 45.Promptly, front upper side position place partly in inboard lens frame 45, extend the guiding groove 47 that is provided with the through slot shape in the axial direction, upper end at the peripheral part of mobile lens frame 46, outstandingly towards the top be provided with directing pin 48, the directing pin 48 of mobile lens frame 46 is inserted in the guiding groove 47 of inboard lens frame 45 in the mode that can slide in the axial direction.In addition, in order to drive mobile lens frame 46, directing pin 48 is formed by magnetics such as metals, and, at the upper side position place of the peripheral part of the front part of outside lens frame 42, extend the driver slot 49 that is provided with the groove shape in the axial direction.Embedded and be fixed in the mobile lens frame 46 as the front objective lens 51 of movable optics.Base end side objective lens 52 is embedded and be fixed in the base end side part of inboard lens frame 45.
In objective optical unit 39, make observation as imaging by object lens protection lens 44, front objective lens 51 and base end side objective lens 52.Here, make mobile lens frame 46 front objective lens 51 be moved moving on the optical axis O direction on optical axis O direction, can carry out focal adjustments thus.
With reference to Fig. 5 to Fig. 7, in the shooting optical unit 41 of present embodiment, in order to obtain high meticulous image and, to use the redness of high pixel and the green of blue CCD of using and high pixel to use CCD as imaging apparatus in order to improve colorrendering quality.CCD 53a and left and right directions are located vertically in the left part of shooting optical unit 41, another CCD 53b and the base end side that axially is located vertically in a CCD 53a.CCD substrate 54a, 54b as the shooting substrate are connected with each CCD 53a, 53b.Two CCD substrate 54a, 54b are with respect to the inclined of image unit 38, and with respect to central shaft be configured in with being mutually symmetrical the left side and the right side, opposite face about a side opposite with the central shaft of image unit 38, the opposite face of a CCD substrate 54a is towards a left side and towards cardinal extremity, and the opposite face of another CCD substrate 54b is towards the right side and towards cardinal extremity.In addition, extend various holding wires from CCD substrate 54a, 54b, various holding wires are pooled to shooting cable 55a, 55b.Two shooting cable 55a, 55b have been used accordingly with two CCD 53a, 53b and CCD substrate 54a, 54b.
The electric connector 32 of endoscope 20 is connected with video processor, and video processor makes CCD 53a, 53b and CCD substrate 54a, 54b action, thus, takes the observation image by CCD 53a, 53b and CCD substrate 54a, 54b, generates picture signal.The picture signal that is generated is output to video processor, will observe pictorial display on monitor etc. by video processor.Under the situation of image unit 38 actions, CCD 53a, 53b and CCD substrate 54a, 54b can generate heat.On the other hand, the action of CCD 53a, 53b and CCD substrate 54a, 54b is subjected to the influence from the heat of outside easily, might cause image deterioration owing to the influence from the heat of outside.In addition, the action of CCD substrate 54a, 54b is subjected to the influence from the electrical noise of outside easily, also might cause image deterioration owing to the influence from the electrical noise of outside.
With reference to Fig. 2 to Fig. 4, to adorn outside and dispose actuating unit 56 in the unit 33, this actuating unit 56 drives the front objective lens 51 of image unit 38.That is, at the upside of image unit 38, along image unit 38, extend and to be provided with actuating unit 56 in the axial direction.Actuating unit 56 has drive magnet 57.Drive magnet 57 is configured in the mode that can slide in the axial direction in the driver slot 49 of outside lens frame 42 of objective optical unit 39.The directing pin 48 of drive magnet 57 and the mobile lens frame 46 of objective optical unit 39 combines in the mode of magnetic, by drive magnet 57 moving in the axial direction, directing pin 48 is moved in the axial direction, thereby mobile lens frame 46 is moved on optical axis O direction.By return spring 60 all the time forward end to drive magnet 57 application of forces.In addition, the leading section as the SMA line 58 of shape memory parts is connected with drive magnet 57.SMA line 58 extends setting in the axial direction.The leading section of live wire 59 is connected with the base end part of SMA line 58, and the base end part of SMA line 58 is retained as and can not moves in the axial direction.In addition, live wire 59 is directed to actuator cable 61, and actuator cable 61 connects insertion bending section 23 and extends to electric connector 32.
The temperature that makes SMA line 58 by switching on via 59 pairs of SMA lines 58 of live wire surpasses transition temperature, the active force of SMA line 58 opposing return springs and contraction distortion in the axial direction thus, and drive magnet 57 moves to cardinal extremity.On the other hand, by stopping the temperature of SMA line 58 being become below the transition temperature to the energising of SMA line 58, SMA line 58 dilatating and deformable in the axial direction thus, the active force by return spring 60 moves drive magnet 57 forward end.Like this, under the situation of actuating unit 56 actions, SMA line 58 can heating.On the other hand, the action of SMA line 58 is subjected to the influence from the heat of outside, and SMA line 58 might can not move rightly because of the influence from the heat of outside.Under these circumstances, drive magnet 57 and mobile lens frame 46 might not can move rightly, thereby obtain not having the observation image of focusing.
With reference to Fig. 2 to Fig. 4, adorn outside and dispose the unit heater 62 of protecting lens 44 to heat to the object lens of image unit 38 in the unit 33.That is, at the end portion of image unit 38, along image unit 38, extend and to be provided with unit heater 62 in the axial direction.Hot device unit 62 has the heating element 63 as heater block.Heating element 63 is configured in the lower portion of the base end side of object lens protection lens 44.In the present embodiment, the cardinal extremity face of heating element 63 and object lens protection lens 44 contacts, and is presented in the lower half circle of this cardinal extremity face the band shape of extending in half cycle roughly along circumference.In addition, heating element 63 also can protect lens 44 not contact with object lens, and the shape of heating element 63 can be set semicircle, crescent etc. arbitrarily for.Heating element 63 is connected with a end as the heater substrate 64 of flexible base, board.Heater substrate 64 is configured between inboard lens frame 45 and the outside lens frame 42, extends the lower position of the interior perimembranous that is arranged at outside lens frame 42 in the axial direction.The leading section of power line 65 is connected with the base end part of heater substrate 64.And power line 65 is pooled in the heater cable 66, and heater cable 66 connects insertion bending section 23 and extends to electric connector 32.
Provide electric power via power line 65 to heater substrate 64 and heating element 63, heating element 63 is heated, thus, the temperature of object lens protection lens 44 rises, and prevents the fuzzy of object lens protection lens 44.Under the situation of unit heater 62 actions, heating element 63 heatings, and heater substrate 64 heatings.In addition, about the signal of telecommunication that transmits by power line, might produce noise because of influence from the electrical noise of outside.
With reference to Fig. 3, Fig. 4 and Fig. 7, in insertion section 21, dispose the lighting unit 67 that illuminates the object of observation.That is, dispose illuminating lens 68 as irradiation part at the leading section of the illumination holes 37 of front exterior member 34.In addition, connect as the leading section of the light guide portion 69 of light guide member and insert illumination holes 37 and fix.The front end face of light guide portion 69 engages with the cardinal extremity face of illuminating lens 68.In the present embodiment, used two lighting units 67, adorned outside in the unit 33, two lighting units 67 are configured in upside with respect to the central shaft of insertion section 21 on above-below direction, are configured in left side and right side with being mutually symmetrical on left and right directions.Light guide portion 69 extends out from front exterior member 34, and perforation is inserted bending section 23 and extended to light source adapter 29.
The light source adapter 29 of endoscope 20 is connected with light supply apparatus, and the illumination light that light supply apparatus generates is provided for illuminating lens 68 by 69 guiding of light guide portion, shines the object of observation from illuminating lens 68.By the 67 guiding illumination light time of lighting unit, produce the light quantity loss, produce heating by lighting unit 67.Especially, the interface place between the cardinal extremity face of the front end face of light guide portion 69 and illuminating lens 68, the light quantity loss is big, and caloric value increases.In addition, in the present embodiment, in order to take two CCD 53a, 53b that observe image and used high pixel, therefore the then image deepening because the sensitivity of CCD 53a, 53b descends has increased the light quantity of illumination light.Therefore, the caloric value of lighting unit 67 increases.
As following being described in detail, in the present embodiment,,, thus, in various unit, guaranteed appropriate action so that the mode of warming-up effect minimum each other disposes various unit for insertion section 21.
With reference to Fig. 2 to Fig. 4, because in the action of unit heater 62, heating element 63 and heater substrate 64 heatings, therefore, the SMA line 58 of actuating unit 56 might be subjected to can not moved rightly by the influence of the heat of heating element 63 and heater substrate 64 generations.To this, in the present embodiment, optical axis O with respect to image unit 38, actuating unit 56 is configured in upper side position, unit heater 62 is configured in lower position, therefore, insertion section 21 axially on observe, actuating unit 56 and unit heater 62 are configured to respect to the optical axis O of image unit 38 toward each other.That is, insertion section 21 axially on observe, each other from farthest, therefore, SMA line 58 is not vulnerable to the influence by the heat of heating element 63 and heater substrate 64 generations in the scope that actuating unit 56 and unit heater 62 are configured on function to be allowed.And, dispose actuating unit 56 in the outside of outside lens frame 42, dispose unit heater 62 in the inboard of outside lens frame 42, therefore, between actuating unit 56 and unit heater 62, dispose the outside lens frame 42 that possesses adiabatic function.Therefore, SMA line 58 more is not vulnerable to the influence by the heat of heating element 63 and heater substrate 64 generations, has guaranteed the appropriate action of actuating unit 56.
In addition, dispose unit heater 62 in the inboard of outside lens frame 42, outside lens frame 42 is embedded and be fixed in the shooting hole 36 of front exterior member 34, therefore, unit heater 62 with outside adorn between the unit 33 and dispose the outside lens frame 42 that possesses adiabatic function.Therefore, prevented that the heating element 63 in unit heater 62 actions and the heating of heater substrate 64 from causing the temperature of outer dress unit 33 to rise.
With reference to Fig. 5, because CCD substrate 54a, 54b heating in the action of image unit 38, therefore, the SMA line 58 of actuating unit 56 might be subjected to can not moved rightly by the influence of the heat of CCD substrate 54a, 54b generation.On the other hand, in the action of unit heater 62 and actuating unit 56, heating element 63 and heater substrate 64,58 heatings of SMA line, therefore, CCD substrate 54a, the 54b of image unit 38 might be subjected to the influence of the heat that produced by heating element 63 and heater substrate 64, SMA line 58 and can not move rightly.To this, in the present embodiment, two CCD substrate 54a, 54b are configured in left side and right side with respect to the central shaft of image unit 38 with being mutually symmetrical, therefore, insertion section 21 axially on observe, the heating center that links actuating unit 56 and the straight line L1 at the heating center of unit heater 62 are the vertical bisecting lines of line segment l2 at the heating center of binding two CCD substrate 54a, 54b.That is, insertion section 21 axially on observe, in the scope that actuating unit 56 and two CCD substrate 54a, 54b and unit heater 62 and two CCD substrate 54a, 54b are configured on function to be allowed each other from farthest.Therefore, SMA line 58 is not vulnerable to the influence by the heat of two CCD substrate 54a, 54b generations, two CCD substrate 54a, 54b are not vulnerable to the influence of the heat that produced by SMA line 58, heating element 63 and heater substrate 64, have guaranteed the appropriate action of actuating unit 56 and image unit 38.
In addition, using with endoscope 20 under the situation of the high-frequency treatment utensil of disposing biological tissue by high frequency electric, owing to the influence of high frequency electric causes producing noise in the signal of telecommunication that the power line 65 by heater cable 66 transmits, CCD substrate 54a, 54b might be subjected to this effect of noise and make image deterioration.As mentioned above, in the present embodiment, insertion section 21 axially on observe, in the scope that unit heater 62 and two CCD substrate 54a, 54b are configured on function to be allowed each other from farthest, therefore, insertion section 21 axially on observe, in the axial direction from unit heater 62 extended heater cables 66 also be configured to respect in two CCD substrate 54a, 54b, the scope of on function, being allowed each other from farthest.So CCD substrate 54a, 54b are not vulnerable to the influence of noise by the signal of telecommunication of power line 65 transmission of heater cable 66, have guaranteed the appropriate action of image unit 38.
With reference to Fig. 5, because lighting unit 67 heatings in the action of lighting unit 67, so CCD substrate 54a, the 54b of the SMA line 58 of actuating unit 56 and image unit 38 might be affected and can not move rightly.In the present embodiment, adorn outside in the unit 33, two lighting units 67 are configured in the left side with respect to the central shaft of insertion section 21 on left and right directions, be configured in upside and downside with on above-below direction, being mutually symmetrical, therefore, insertion section 21 axially on observe, the straight line L2 that links the heating center of two CCD substrate 54a, 54b is the vertical bisecting line of line segment l3 at the heating center of two lighting units 67 of binding.That is, insertion section 21 axially on observe, in the scope that actuating unit 56 and two lighting units 67 and two CCD substrate 54a, 54b and two lighting units 67 are configured on function to be allowed each other from farthest.Therefore, SMA line 58 and two CCD substrate 54a, 54b are not vulnerable to the influence of the heat that produced by two lighting units 67, have guaranteed the appropriate action of actuating unit 56 and image unit 38.
With reference to Fig. 6 and Fig. 7, SMA line 58 heatings in the action of actuating unit 56, especially heating element 63 heatings in the action of unit heater 62, CCD 53a, 53b and CCD substrate 54a, 54b heating in the action of image unit 38, especially the interface between illuminating lens 68 and the light guide portion 69 generates heat in the action of lighting unit 67.SMA line 58, CCD 53a, 53b and CCD substrate 54a, 54b might can not move rightly because of the influence of the heating of other heating portions.In the present embodiment, interface between illuminating lens 68 and the light guide portion 69, heating element 63, SMA line 58, CCD 53a, 53b and CCD substrate 54a, 54b insertion section 21 axially on dispose successively to base end side from front with staggering, therefore, SMA line 58, CCD 53a, 53b and CCD substrate 54a, 54b are not vulnerable to the influence of the heating of other heating portions, have guaranteed the appropriate action of actuating unit 56 and image unit 38.
In addition, SMA line 58, CCD 53a, 53b and CCD substrate 54a, 54b, heating element 63 and heater substrate 64, lighting unit 67 are owing to the influence of other heating portions causes caloric value to increase, the result is, might cause the temperature of rigid 22 integral body of front end to rise, and adorn the temperature rising of unit 33 outward.In the present embodiment, as mentioned above, SMA line 58, CCD 53a, 53b and CCD substrate 54a, 54b, heating element 63 and heater substrate 64, lighting unit 67 are configured to can not be subjected to the warming-up effect of other heating portions as far as possible, have prevented that the temperature of outer dress unit 33 from rising.
As described in face, in the present embodiment, be configured to make the influence of heating each other to reach minimum various unit.Consequently, as shown in Figure 5, insertion section 21 axially on observe, two light guide portion 69 and actuating unit 56 are arranged in respectively on the left and right directions with unit heater 62, link the straight line L3, parallel to each other with the straight line L1 at the center of center that links actuating unit 56 and unit heater 62 at the center of two light guide portion 69.Therefore, effectively utilized space in the outer dress unit 33 to greatest extent.In addition, prevented from when the enterprising line bend of above-below direction is moved, to apply unnecessary burden to light guide portion 69 from actuating unit 56 and unit heater 62.In addition, as shown in Figure 8, from light guide portion 69 and other various unit 38,56,62 extended various cable 55a, 55b, 61,66 the central shafts of lighting unit 67, be not configured in the bending section 23 on the direction up and down with respect to bending section 23 with laying particular stress on.Therefore prevented from when bending section 23 bendings, to advance because of laying particular stress on of inner matter causes the bending section bending.
In the above-described embodiment, actuating unit 56 is configured to unit heater 62, insertion section 21 axially on observe, with respect to the optical axis O of image unit 38 and toward each other, also can make actuating unit 56 and unit heater be configured in opposition side each other simply with respect to the central shaft of image unit 38.In addition, can also dispose as follows, that is: insertion section 21 axially on observe, make actuating unit 56 more than 1 and the unit heater more than 1 62 be configured in opposition side each other with respect to the optical axis O of image unit 38.

Claims (7)

1. endoscope insertion part, it extends in the axial direction, it is characterized in that, and this endoscope insertion part has:
Image unit (38), it is taken and observes image, this image unit (38) has the front end optics (44) of the leading section that is disposed at described image unit (38) and movable optics (51) that can be mobile with respect to described front end optics (44), and this image unit (38) has optical axis (O);
Actuating unit (56), it drives described movable optics (51), and having can be along with the shape memory parts (58) of temperature deformation; And
Unit heater (62), it has the heater block (63) that described front end optics (44) is heated, observe axially going up of described insertion section (21), with respect to the optical axis (O) of described image unit (38), this unit heater (62) is configured in a side opposite with a side that disposes described actuating unit (56).
2. endoscope insertion part according to claim 1 is characterized in that,
Described image unit (38) has the support unit (42) at the upwardly extending tubular of axle of described insertion section (21),
Described movable optics (51) and described front end optics (44) are configured in the inner chamber of described support unit (42),
Described actuating unit (56) is configured in the outer circumferential surface section of described support unit (42),
Described unit heater (62) is configured in the inner peripheral surface portion of described support unit (42),
Described support unit (42) has adiabatic function.
3. endoscope insertion part according to claim 1 is characterized in that,
Described image unit (38) has two shooting substrates (54a, 54b),
Observe axially going up of described insertion section (21), the straight line (L1) that links described actuating unit (56) and described unit heater (62) is the approximate vertical bisecting line that links the line segment (12) of described two shooting substrates (54a, 54b).
4. endoscope insertion part according to claim 3 is characterized in that,
Described endoscope insertion part also has two lighting units (67) that are used for providing to the object of observation illumination light,
Observe axially going up of described insertion section (21), the straight line (L2) that links described two shooting substrates (54a, 54b) is the approximate vertical bisecting line that links the line segment (13) of described two lighting units (67).
5. endoscope insertion part according to claim 1 is characterized in that,
Described shape memory parts (58) and described heater block (63) described insertion section (21) axially on dispose mutually with staggering.
6. endoscope insertion part according to claim 5 is characterized in that,
Described image unit (38) has imaging apparatus (53a, 53b) and shooting substrate (54a, 54b),
Described shape memory parts (58), described heater block (63), described imaging apparatus (53a, 53b) and described shooting substrate (54a, 54b) described insertion section (21) axially on dispose mutually with staggering.
7. endoscope insertion part according to claim 6 is characterized in that,
Described endoscope insertion part also has the lighting unit (67) that is used for providing to the object of observation illumination light,
Described lighting unit (67) has: the light guide member of guiding illumination light (69); And irradiation part (68), this irradiation part (68) is connected with the end of described light guide member (69), to the illumination light of object of observation irradiation by described light guide member (69) guiding,
Connecting portion between described shape memory parts (58), described imaging apparatus (53a, 53b) and described shooting substrate (54a, 54b) and described light guide member (69) and the described irradiation part (68) described insertion section (21) axially on dispose mutually with staggering.
CN200980133010.XA 2008-10-24 2009-10-23 Insertion section of endoscope Active CN102131450B (en)

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WO2010047396A1 (en) 2010-04-29
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JP4624484B2 (en) 2011-02-02
US8142351B2 (en) 2012-03-27
US20100268027A1 (en) 2010-10-21
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JPWO2010047396A1 (en) 2012-03-22
EP2324754B1 (en) 2013-07-31

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